You are completely incorrect, and you should research your claims before posting on the internet. Minors have a right to access to their legal guardians when they are under arrest, not when they are being detained.

Clearly, he was being arrested. Or did you think that a tasing and handcuffing were just standard practice for detainment?

You have a right to the presence of your legal guardian once you are under arrest, and the process is not immediate. You can't demand your mothers presence in the back seat of a cop car. You can at the station though, for example.

You don't have the right when you are in the process of being arrested, especially if you are actively resisting arrest.